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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings.wifi.p2p;
     18 
     19 import com.android.settings.R;
     20 
     21 import android.content.BroadcastReceiver;
     22 import android.content.Context;
     23 import android.content.Intent;
     24 import android.content.IntentFilter;
     25 import android.net.wifi.p2p.WifiP2pManager;
     26 import android.os.Message;
     27 import android.preference.CheckBoxPreference;
     28 import android.preference.Preference;
     29 import android.provider.Settings;
     30 import android.util.Log;
     31 
     32 /**
     33  * WifiP2pEnabler is a helper to manage the Wifi p2p on/off
     34  */
     35 public class WifiP2pEnabler implements Preference.OnPreferenceChangeListener {
     36     private static final String TAG = "WifiP2pEnabler";
     37 
     38     private final Context mContext;
     39     private final CheckBoxPreference mCheckBox;
     40     private final IntentFilter mIntentFilter;
     41     private WifiP2pManager mWifiP2pManager;
     42     private WifiP2pManager.Channel mChannel;
     43 
     44     private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
     45         @Override
     46         public void onReceive(Context context, Intent intent) {
     47             String action = intent.getAction();
     48 
     49             if (WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION.equals(action)) {
     50                 handleP2pStateChanged(intent.getIntExtra(
     51                         WifiP2pManager.EXTRA_WIFI_STATE, WifiP2pManager.WIFI_P2P_STATE_DISABLED));
     52             }
     53         }
     54     };
     55 
     56     public WifiP2pEnabler(Context context, CheckBoxPreference checkBox) {
     57         mContext = context;
     58         mCheckBox = checkBox;
     59 
     60         mWifiP2pManager = (WifiP2pManager) context.getSystemService(Context.WIFI_P2P_SERVICE);
     61         if (mWifiP2pManager != null) {
     62             mChannel = mWifiP2pManager.initialize(mContext, mContext.getMainLooper(), null);
     63             if (mChannel == null) {
     64                 //Failure to set up connection
     65                 Log.e(TAG, "Failed to set up connection with wifi p2p service");
     66                 mWifiP2pManager = null;
     67                 mCheckBox.setEnabled(false);
     68             }
     69         } else {
     70             Log.e(TAG, "mWifiP2pManager is null!");
     71         }
     72         mIntentFilter = new IntentFilter(WifiP2pManager.WIFI_P2P_STATE_CHANGED_ACTION);
     73 
     74     }
     75 
     76     public void resume() {
     77         if (mWifiP2pManager == null) return;
     78         mContext.registerReceiver(mReceiver, mIntentFilter);
     79         mCheckBox.setOnPreferenceChangeListener(this);
     80     }
     81 
     82     public void pause() {
     83         if (mWifiP2pManager == null) return;
     84         mContext.unregisterReceiver(mReceiver);
     85         mCheckBox.setOnPreferenceChangeListener(null);
     86     }
     87 
     88     public boolean onPreferenceChange(Preference preference, Object value) {
     89 
     90         if (mWifiP2pManager == null) return false;
     91 
     92         mCheckBox.setEnabled(false);
     93         final boolean enable = (Boolean) value;
     94         if (enable) {
     95             mWifiP2pManager.enableP2p(mChannel);
     96         } else {
     97             mWifiP2pManager.disableP2p(mChannel);
     98         }
     99         return false;
    100     }
    101 
    102     private void handleP2pStateChanged(int state) {
    103         mCheckBox.setEnabled(true);
    104         switch (state) {
    105             case WifiP2pManager.WIFI_P2P_STATE_ENABLED:
    106                 mCheckBox.setChecked(true);
    107                 break;
    108             case WifiP2pManager.WIFI_P2P_STATE_DISABLED:
    109                 mCheckBox.setChecked(false);
    110                 break;
    111             default:
    112                 Log.e(TAG,"Unhandled wifi state " + state);
    113                 break;
    114         }
    115     }
    116 
    117 }
    118